As a personal trainer, one of the difficulties I often run into is trying to balance what a client can do with what they want to do. Often times these situations will look like this:
Client: “I want to build my glutes.”
Me: “Okay, let’s add in some lunges today.”
Client: (During the first set) “Ouch, this is bothering my knee.”
I call this dilemma the physiological/mechanical tradeoff. It’s a tradeoff because, as personal trainers, we know how we want to challenge our clients’ physiology, but we need to be able to do so within the mechanical parameters that are presented.